Cat® C0.5 Diesel Engine

Cat® C0.5 Diesel Engine

The C0.5 Industrial Diesel Engine is offered in ratings ranging from 8.2-10.2 bkW (11.0-13.7 bhp) @ 2800-3600 rpm. These ratings are available for Europe and, depending on applicable emission standards, may be introduced in other regulated and non-regulated areas. Nonroad engines less than 19 kW (25 hp) are not currently subject to EU emission standards. Industries and applications powered by C0.5 engines include Auxiliary Power Units, Compactors/Rollers, Mobile Earthmoving Equipment, Mobile Light Towers and Turf and Landscaping.

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Power Rating

Minimum Power
Maximum Power
Rated Speed
2800-3600 rpm

Emission Standards

U.S. EPA Tier 4 Interim Equivalent. Nonroad engines less than 19 kW (25 hp) are not currently subject to EU emission standards.


Engine Configuration
Inline 2, 4-Stroke-Cycle Diesel
67 mm (2.64 in)
72 mm (2.83 in)
0.5 L (31 in³)
Naturally Aspirated (NA)
Compression Ratio
Combustion System
Indirect Injection
Rotation (from flywheel end)
Lube System (refill)
1.61-2.01 L (1.70-2.12 qt)

Engine Dimensions (Approximate. Final dimensions dependent on selected options)

407 mm (16 in)
371 mm (14.6 in)
523 mm (20.6 in)
Weight, Net Dry (Basic Operating Engine Without Optional Attachments)
57 kg (126 lb)

Standard Equipment

  • Air Inlet System
    • Inlet manifold with choice of inlets.
  • Control System
    • Alternator 12 volt 14 amp
    • Starter motor 12 volt
    • Glow plug starting aid
  • Cooling System
    • Belt-driven coolant pump
    • Coolant temperature switch
    • Choice of cooling fans
  • Flywheel And Flywheel Housing
    • SAE No. 6 1/2 flywheel
    • Choice of SAE No. 5 or standard backplate flywheel housing
  • Fuel System
    • Fuel injection pump
    • Spin-on fuel filter
    • Electronic Shut-off Solenoid (ESOS)
  • Lube System
    • Closed circuit breather
    • Spin-on lube oil filter
    • Lube oil pressure switch
    • Lube oil sump
  • General
    • Cast iron, engine block
    • Cast iron exhaust manifold--side outlet
    • Cold start capability to -20° C (-4° F)
    • Gradeability 35° continuous
    • Paint: Caterpillar yellow, with optional colors available at request